general science

Chemistry MCQ Questions and Answers page - 8

1.

Which of the following can  NOT  act as a bleaching agent  ?

Answer/ Hint      

Answer : A

Explanation :

2.

Milkiness observed on passing carbon dioxide through lime water is due to the formation of  :

Answer/ Hint      

Answer : C

Explanation :

3.

Brown ring test is used for the detection of

Answer/ Hint      

Answer : C

Explanation :

4.

What is the common name of CaOCl2  ?

Answer/ Hint      

Answer : C

Explanation :

5.

Which of the flowing is the common name of Phosgene  ?

Answer/ Hint      

Answer : A

Explanation :

6.

Which of the following chemicals is used as rodenticide  ?

Answer/ Hint      

Answer : B

Explanation :

7.

Which of the following compounds is used as drying agent  ?

Answer/ Hint      

Answer : A

Explanation :

8.

Which of the following is slaked lime  ?

Answer/ Hint      

Answer : A

Explanation :

9.

Aqua regia is a mixture of  _____________ .

Answer/ Hint      

Answer : D

Explanation :

10.

Which acid is the most abundant acid found in grapes  ?

Answer/ Hint      

Answer : C

Explanation :

11.

Hydrogen chloride is  ___________ .

Answer/ Hint      

Answer : A

Explanation :

12.

Which of the following solution is used in black and white photography  ?

Answer/ Hint      

Answer : D

Explanation :

13.

Which acid is found in ant’s sting  ?

Answer/ Hint      

Answer : B

Explanation :

14.

Which of the following is  NOT  a from of calcium carbonate  ?

Answer/ Hint      

Answer : A

Explanation :

15.

What is the chemical formula of baking soda  ?

Answer/ Hint      

Answer : C

Explanation :

16.

Catalyst is a substance which

Answer/ Hint      

Answer : D

Explanation :

17.

Alum stops bleeding in minor cuts because of

Answer/ Hint      

Answer : D

Explanation :

18.

A substance which readily forms colloidal solution in contact with water is called

Answer/ Hint      

Answer : D

Explanation :

19.

An emulsion is a colloid of a

Answer/ Hint      

Answer : B

Explanation :

20.

Water is not effective in extinguishing a fire caused by petrol because

Answer/ Hint      

Answer : D

Explanation :

21.

An emulsifier is an agent which

Answer/ Hint      

Answer : A

Explanation :

22.

Which one of the following is used as a sowing agent in the preparation of soft drinks  ?

Answer/ Hint      

Answer : A

Explanation :

23.

Which type of radiations are absorbed by the upper layer of the atmosphere  ?

Answer/ Hint      

Answer : D

Explanation :

24.

An example of replenshible energy source is 

Answer/ Hint      

Answer : D

Explanation :

25.

Tar roads get damaged if there is

Answer/ Hint      

Answer : A

Explanation :

26.

The drug  ‘Marijuana’  is a

Answer/ Hint      

Answer : A

Explanation :

27.

Gelatin is mostly used in making ice-creams in order to

Answer/ Hint      

Answer : B

Explanation :

28.

Which halide is used in making sensitive emulsion on photographic film  ?

Answer/ Hint      

Answer : B

Explanation :

29.

In the electroplating of gold, the electrolyte used is

Answer/ Hint      

Answer : C

Explanation :

30.

Refrigerators keep food unspoiled because

Answer/ Hint      

Answer : A

Explanation :

31.

The unit of ionic product of water (Kw) is  :

Answer : B

Explanation :

32.

Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives

Answer/ Hint      

Answer : A

Explanation :

33.

Burning pyrites ore gives out

Answer/ Hint      

Answer : B

Explanation :

34.

Which one of the following is an example of a gel  ?

Answer/ Hint      

Answer : C

Explanation :

35.

When a spoon is to be electroplated with nickel the spoon is 

Answer/ Hint      

Answer : C

Explanation :

36.

The process by which milk is concerted to curd is called

Answer/ Hint      

Answer : C

Explanation :

37.

The function of sedimentation tank in sewage treatment is to  :

Answer/ Hint      

Answer : D

Explanation :

38.

The liquid waste from kitchens and baths, of residences is known as  :

Answer/ Hint      

Answer : C

Explanation :

39.

Which of the following is biodegradable  ?

Answer/ Hint      

Answer : A

Explanation :

40.

Earth’s atmosphere is an envelope of gases extending to a height of

Answer/ Hint      

Answer : C

Explanation :

41.

The sewage obtained from water closets and urinals is known as

Answer/ Hint      

Answer : A

Explanation :

42.

Maximum permissible concentration of total hardness in drinking water is

Answer/ Hint      

Answer : C

Explanation :

43.

Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled  ?

Answer/ Hint      

Answer : D

Explanation :

44.

Hard water and soft water can be distinguished by using

Answer/ Hint      

Answer : C

Explanation :

45.

Water cycle refers to

Answer/ Hint      

Answer : B

Explanation :

46.

Hardness of the water is commonly measured in terms of

Answer/ Hint      

Answer : A

Explanation :

47.

The unit to measure the flow of water is

Answer/ Hint      

Answer : D

Explanation :

48.

Surface water is a better source of drinking water because it is poor in

Answer/ Hint      

Answer : C

Explanation :

49.

The enormous amount of energy released in an explosion of an atomic bomb is due to the

Answer/ Hint      

Answer : D

Explanation :

50.

The hottest part of the gas flame is known as

Answer/ Hint      

Answer : C

Explanation :

51.

If the sewage is fully oxidized, the nitrogen is in the form of

Answer/ Hint      

Answer : D

Explanation :

52.

Piped Natural Gas (PNG) is used for

Answer/ Hint      

Answer : D

Explanation :

53.

The degree of dissociation of an electrolyte depends on

Answer/ Hint      

Answer : A

Explanation :

54.

The pH of lemon juice is expected to be

Answer/ Hint      

Answer : C

Explanation :

55.

In electro-refining the pure metal is deposited on

Answer/ Hint      

Answer : C

Explanation :

56.

The open  “Sigrees”  or coal stoves often require fanning to sustain burning because of

Answer/ Hint      

Answer : A

Explanation :

57.

Combustion of a candle is  a/an

Answer/ Hint      

Answer : D

Explanation :

58.

pH scale ranges from

Answer/ Hint      

Answer : C

Explanation :

59.

For a spontaneous process

Answer : B

Explanation :

60.

The apparatus used to test acidity of aqueous solution is

Answer/ Hint      

Answer : A

Explanation :

61.

The heat value of combustion of Gasoline is

Answer/ Hint      

Answer : D

Explanation :

62.

Concentration of a material which is lethal to 50% animal is called

Answer/ Hint      

Answer : A

Explanation :

63.

The buffer action of blood is due to the presence of

Answer : D

Explanation :

64.

Which of the following appeared to be with a significant potential for accumulation through food chains  ?

Answer/ Hint      

Answer : A

Explanation :

65.

Soap helps in better cleaning of clothes because

Answer/ Hint      

Answer : B

Explanation :

66.

In a reaction of the type  A+B   →  C+D  one could ensure it to be a first order reaction by  :

Answer/ Hint      

Answer : C

Explanation :

67.

Soldering of two metals is possible because of the property of  :

Answer/ Hint      

Answer : C

Explanation :

68.

The deterioration of a metal by an electrochemical process is commonly termed as

Answer/ Hint      

Answer : B

Explanation :

69.

Kinetics is the study of  :

Answer/ Hint      

Answer : D

Explanation :

70.

What is a common name for the substance which irritates lachrymal glands  ?

Answer/ Hint      

Answer : A

Explanation :

71.

Which of the following is not a commercial source of energy  ?

Answer/ Hint      

Answer : D

Explanation :

72.

Even after sunset, the air near the Earth’s surface continue to receive heat due to

Answer/ Hint      

Answer : A

Explanation :

73.

Which of the process is known as nitrification  ?

Answer/ Hint      

Answer : C

Explanation :

74.

The source of energy that causes the least global warming is

Answer/ Hint      

Answer : B

Explanation :

75.

Thermal electricity is generated by using which of these  ?

Answer/ Hint      

Answer : C

Explanation :

76.

Sullage water is

Answer/ Hint      

Answer : A

Explanation :

77.

Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of

Answer/ Hint      

Answer : A

Explanation :

78.

___________  is a by product of sewage treatment and can be decomposed to produce biogas

Answer/ Hint      

Answer : B

Explanation :

79.

The  ‘solid waste’  is also known as

Answer/ Hint      

Answer : C

Explanation :

80.

Which of the following has pH value 7  ?

Answer/ Hint      

Answer : A

Explanation :

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